Abstract
Chemically assisted dry comminution (CADC) of an inorganic powder was conducted in order to obtain fine powder with large specific surface area. Soda glass powder was comminuted with lithium nitrate under dry conditions. The interaction of lithium nitrate with soda glass powder during the comminution assisted the soda glass powder in being comminuted. Soda glass powder of about 180 m 2/g was prepared by CADC, whereas the specific surface area in ordinary dry comminution (DC) of soda glass powder was only 3.8 m 2/g. Zirconia content as a contaminant was lower in CADC than in ordinary DC. The prevention of agglomeration of the comminuted soda glass by lithium nitrate and the ion-exchange between lithium and sodium ions in the soda glass powder during CADC were thought to help the comminution.
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